EDCh 9 power

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1、POWERMANAGEMENTCHAPTER9:POWERMANAGEMENTINTRODUCTION9.1SECTION9.1:LINEARVOLTAGEREGULATORS9.3LINEARREGULATORBASICS9.3PASSDEVICESANDTHEIRASSOCIATEDTRADE-OFFS9.5LOWDROPOUTREGULATORARCHITECTURES9.9THEanyCAPLOWDROPOUTREGULATORFAMILY9.13DESIGNFEATURESRELATEDTODCP

2、ERFORMANCE9.13DESIGNFEATURESRELATEDTOACPERFORMANCE9.15THEanyCAPPOLE-SPLITTINGTOPOLOGY9.15LDOREGULATORTHERMALCONSIDERATIONS9.17REGULATORCONTROLLERDIFFERENCES9.20ABASIC5V/1ALDOREGULATORCONTROLLER9.21SELECTINGTHEPASSDEVICE9.22THERMALDESIGN9.23SENSINGRESISTORS

3、FORLDOCONTROLLERS9.23PCBLAYOUTISSUES9.25REFERENCES9.26SECTION9.2:SWITCHMODEREGULATORS9.27INTRODUCTION9.27INDUCTORANDCAPACITORFUNDAMENTALS9.28IDEALSTEP-DOWN(BUCK)CONVERTER9.31IDEALSTEP-UP(BOOST)CONVERTER9.36BUCK-BOOSTTOPOLOGIES9.42OTHERNONISOLATEDSWITCHERTO

4、POLOGIES9.44ISOLATEDSWITCHINGREGULATORTOPOLOGIES9.45SWITCHMODULATIONTECHNIQUES9.47CONTROLTECHNIQUES9.48GATEDOSCILLATOR(PULSEBURSTMODULATION)CONTROLEXAMPLE9.51DIODEANDSWITCHCONSIDERATIONS9.54INDUCTORCONSIDERATIONS9.57CAPACITORCONSIDERATIONS9.69SWITCHINGREGU

5、LATOROUTPUTFILTERING9.76SWITCHINGREGULATORINPUTFILTERING9.77REFERENCES9.78BASICLINEARDESIGNSECTION9.3:SWITCHEDCAPACITORVOLTAGECONVERTERS9.81INTRODUCTION9.81CHARGETRANSFERUSINGCAPACITORS9.83UNREGULATEDSWITCHEDCAPACITORINVERTERANDDOUBLERIMPLEMENTATIONS9.87VO

6、LTAGEINVERTERANDDOUBLERDYNAMICOPERATION9.88SWITCHEDCAPACITORVOLTAGECONVERTERPOWERLOSSES9.90REGULATOROUTPUTSWITCHEDCAPACITORVOLTAGECONVERTERS9.92POWERMANAGEMENTINTRODUCTIONCHAPTER9:POWERMANAGEMENTIntroductionAllelectronicsystemsrequirepowersuppliestooperate

7、.Thispartofthesystemdesignisoftenoverlooked.But,asdiscussedintheamplifiersectiononPSRR(PowerSupplyRejectionRatio),theACcomponentofthepowersupply(noise)mayaddtotheoutputoftheamplifier.AndthePSRRhasastrongfrequencydependence,fallingasfrequencyincreases.Thesu

8、pplyvoltage(s)mustbekeptasquietaspossibleforoptimumperformanceofhighperformancecircuits.Localdecouplinghelps—butitisnotsufficient.Powermanagementbroadlyreferstothegenerationandcontrolofregulatedvoltagesrequir